| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hydraulic system which enables an easy return to a predetermined ordered operation even if the predetermined ordered operation is lost, and a forklift including the hydraulic system. <P>SOLUTION: The hydraulic system 1A includes: a first hydraulic cylinder 5 which raises and lowers a fork; second hydraulic cylinders 6A and 6B which raises and lowers an inner mast provided with the first hydraulic cylinder 5; piping 11 and piping 12 which connect the first hydraulic cylinder 5 and second hydraulic cylinders 6A and 6B to each other; and a hydraulic device 10A. The hydraulic device 10A includes: a hydraulic pump 15 and a hydraulic motor 16; detection means 17a and 17b for detecting operations of the first hydraulic cylinder 5 and second hydraulic cylinders 6A and 6B; an order determination unit 18 which determines whether the first hydraulic cylinder 5 and second hydraulic cylinders 6A and 6B operate in a predetermined order; and a control unit 19 which reduces a rotational speed of the hydraulic motor 16 when the order determination unit 18 determines that they do not operate in the predetermined order. <P>COPYRIGHT: (C)2013,JPO&INPIT |
